109749851825 has 18 divisors (see below), whose sum is σ = 136652412354. Its totient is φ = 87437086720.

The previous prime is 109749851749. The next prime is 109749851843. The reversal of 109749851825 is 528158947901.

It can be written as a sum of positive squares in 9 ways, for example, as 230553856 + 109519297969 = 15184^2 + 330937^2 .

It is not a de Polignac number, because 109749851825 - 2¹² = 109749847729 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26552459 + ... + 26556591.

Almost surely, 2^109749851825 is an apocalyptic number.

It is an amenable number.

109749851825 is a deficient number, since it is larger than the sum of its proper divisors (26902560529).

109749851825 is an frugal number, since it uses more digits than its factorization.

109749851825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533 (or 4395 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 59.

The spelling of 109749851825 in words is "one hundred nine billion, seven hundred forty-nine million, eight hundred fifty-one thousand, eight hundred twenty-five".